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（六）数学好玩
Author:
玖玖
GeoGebra
New Resources
美國國旗 (Codex 版)
Fibonacci Clock
近似值：有效數字
國旗 (作圖步驟直接餵給 Claude)
長方體平面投影 (Codex版)
Discover Resources
平行線截等比例
Copy of 劉徽的「割圓術」
Application of integration
圓例9
三角形内角和的折叠法演示
Discover Topics
Coordinates
Function Graph
Dilation
Square
Cosine